What is the LCM of 20, 30 and 60?
LCM of 20, 30 and 60 is the smallest number which divides 20, 30 and 60 exactly without a remainder.
Answer: LCM of 20, 30 and 60 is 60
For 20, 30 and 60 the smallest number which would be perfectly divisible by them is their LCM which is 60. Let us see how to calculate it below:
Explanation:
Least Common Multiple of 20, 30 and 60 is the smallest number that will divide 20, 30 and 60 exactly.

LCM of 20, 30 and 60 by Listing the Multiples Method
List the first few multiples of 20, 30 and 60 and find the common multiples.
Multiples of 20 are 20, 40, 60, 80, 100,..
Multiples of 30 are 30, 60, 90, 120,..
Multiples of 60 are 60, 120, 180,..
The smallest among the common multiples is the LCM of 20, 30 and 60 which in the above case we can see is 60. So, 60 is the LCM (20, 30, 60)
LCM of 20, 30 and 60 by Common Division Method
Here we will divide the numbers 20, 30 and 60 simultaneously with prime numbers until we don't have a prime number to further divides 20, 30 and 60.
So, the least common multiple of 20, 30 and 60 the product of theprime numbers used in the division which is 60.